How is the polymerase chain reaction useful in DNA fingerprinting?

Answer 1

Experts may have to do DNA fingerprinting with a very small amount of sample to identify a person, living or dead. Polymerase chain reaction helps them to amplify the sample.

Polymerase chain reaction can take place within a machine where multiple copies (in thousands) of a DNA double helix could be generated.

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Answer 2

Logan Allen

In forensic investigations, where only trace amounts of DNA may be available, the polymerase chain reaction (PCR) is helpful because it amplifies specific regions of DNA, creating enough material for analysis. Additionally, PCR allows for the selective amplification of target DNA regions, like short tandem repeats (STRs), which are highly polymorphic and can be used as unique genetic markers for individual identification. As a result, PCR significantly improves the sensitivity and specificity of DNA fingerprinting techniques.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.